DOI: 10.1007/s11069-021-04570-7
论文题名: The physical–mechanical properties degradation mechanism and microstructure response of acid–alkali-contaminated Xiashu loess
作者: Sun S. ; Wang W. ; Wei J. ; Song J. ; Yu Y. ; He W. ; Zhang J.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 106, 期: 3 起始页码: 2845
结束页码: 2861
语种: 英语
中文关键词: Acid–alkali environment
; Material composition
; Mechanical properties
; Microstructure
; Xiashu loess
英文关键词: alkalinity
; degradation
; landslide
; loess
; mechanical property
; microstructure
; physical property
; scanning electron microscopy
; sulfuric acid
; void ratio
; China
; Jiangsu
; Nanjing [Jiangsu]
英文摘要: Water pollution has changed the physical and mechanical properties of Xiashu loess, which has become an important factor in the frequent occurrence of Xiashu loess landslides. In order to understand the mechanism of Xiashu loess landslide in acid or alkali environment, a large number of Xiashu loess samples were collected in Nanjing City, Jiangsu Province. X-ray diffraction, energy-dispersive analysis of X-ray, compression test, direct shear test, and scanning electron microscope test (SEM) were used to analyze physical properties, mechanical properties, and microstructure of acid–alkali-contaminated Xiashu loess. The results show that the newly formed insoluble (slightly soluble) substances in the alkalization Xiashu loess increase its density and decrease the void ratio and water content. In sulfuric acid solution, the minerals in Xiashu loess mainly suffer dissolution reactions, which leads to decrease in soil density and increase in void ratio and water content. In the SEM image, the surface of acidified Xiashu loess soil particles is rough and uneven, while the surface of alkalized Xiashu loess soil particles is smooth and flat. This is an important reason that the internal friction angle of acidified Xiashu loess is significantly higher than that of alkalized Xiashu loess. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. part of Springer Nature.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169390
Appears in Collections: 气候变化与战略
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作者单位: School of Earth Sciences and Engineering, Hohai University, Nanjing, 210098, China; Jiangsu Province Geological Survey Institute, Nanjing, 210018, China
Recommended Citation:
Sun S.,Wang W.,Wei J.,et al. The physical–mechanical properties degradation mechanism and microstructure response of acid–alkali-contaminated Xiashu loess[J]. Natural Hazards,2021-01-01,106(3)